This is a cool clock. We forked it, added a bunch of themes to the deb file, and added a theme manager and previewer. That is dependent on yad, which is available in backports from for Debian 7 and 8 in the MX 14 and 15 repos, upstream Debian, and in Ubuntu from Wily+, or in PPA's for older PPAs. (We don't know enough Python to write the theme manager in that :( ) The deb is here: http://main.mepis-deb.org/mx/repo/pool/main/m/mx-clocky/mx-clocky_16.5.3_all.deb